Is your feature request related to a problem? Please describe.
As a continuation of arcus-azure/arcus.observability#287, we should also remove the Azure Key Vault validation on the public methods of the Azure Key Vault secret provider.
Describe the solution you'd like
Remove all the guard regex validations on the Azure Key Vault secret provider, so it solely verify for a non-blank secret name.
Additional context
Original discussion: arcus-azure/arcus.observability#260